package com.demo.io.server;

import com.demo.io.common.MyWebSocketHandler;
import com.jfinal.plugin.IPlugin;
import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.http.HttpObjectAggregator;
import io.netty.handler.codec.http.HttpServerCodec;
import io.netty.handler.codec.http.websocketx.WebSocketServerProtocolHandler;
import io.netty.handler.stream.ChunkedWriteHandler;

/**
 *
 */
public class NettyServerStarter implements IPlugin {


	private final int port;

	public NettyServerStarter(int port) {
		this.port = port;
	}

	public void runServer() throws Exception {
		EventLoopGroup bossGroup = new NioEventLoopGroup();
		EventLoopGroup group = new NioEventLoopGroup();
		try {
			ServerBootstrap sb = new ServerBootstrap();
			sb.option(ChannelOption.SO_BACKLOG, 1024);
			sb.group(group, bossGroup) // 绑定线程池
					.channel(NioServerSocketChannel.class) // 指定使用的channel
					.localAddress(this.port)// 绑定监听端口
					.childHandler(new ChannelInitializer<SocketChannel>() { // 绑定客户端连接时候触发操作
						@Override
						protected void initChannel(SocketChannel ch) throws Exception {
							System.out.println("收到新连接");
							//websocket协议本身是基于http协议的，所以这边也要使用http解编码器
							ch.pipeline().addLast(new HttpServerCodec());
							//以块的方式来写的处理器
							ch.pipeline().addLast(new ChunkedWriteHandler());
							ch.pipeline().addLast(new HttpObjectAggregator(8192));
							ch.pipeline().addLast(new WebSocketServerProtocolHandler("/ws", "WebSocket", true, 65536 * 10));
							ch.pipeline().addLast(new MyWebSocketHandler());//自定义助手类
						}
					});
			ChannelFuture cf = sb.bind().sync(); // 服务器异步创建绑定
			System.out.println(NettyServerStarter.class + " 启动正在监听： " + cf.channel().localAddress());
			cf.channel().closeFuture().sync(); // 关闭服务器通道
		} finally {
			group.shutdownGracefully().sync(); // 释放线程池资源
			bossGroup.shutdownGracefully().sync();
		}
	}

	@Override
	public boolean start() {
		try {
			runServer();
		} catch (Exception e) {
			e.printStackTrace();
		}
		return true;
	}

	@Override
	public boolean stop() {
		return false;
	}
}